vkd3d-shader: Add mechanism to get vkd3d-shader implementation revision.

Not immediately useful, might be nuked later in development.

Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>

include/vkd3d_shader.h

@@ -799,6 +799,8 @@ int vkd3d_shader_compile_dxil_export(const struct vkd3d_shader_code *dxil,
 uint32_t vkd3d_shader_compile_arguments_select_quirks(
         const struct vkd3d_shader_compile_arguments *args, vkd3d_shader_hash_t hash);
 
+uint64_t vkd3d_shader_get_revision(void);
+
 #endif  /* VKD3D_SHADER_NO_PROTOTYPES */
 
 /*

libs/vkd3d-shader/vkd3d_shader_main.c

@@ -736,3 +736,12 @@ uint32_t vkd3d_shader_compile_arguments_select_quirks(
     else
         return 0;
 }
+
+uint64_t vkd3d_shader_get_revision(void)
+{
+    /* This is meant to be bumped every time a change is made to the shader compiler.
+     * Might get nuked later ...
+     * It's not immediately useful for invalidating pipeline caches, since that would mostly be covered
+     * by vkd3d-proton Git hash. */
+    return 1;
+}